/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
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 */

package org.apache.iotdb.db.it.aligned;

import org.apache.iotdb.db.it.utils.AlignedWriteUtil;
import org.apache.iotdb.it.env.ConfigFactory;
import org.apache.iotdb.it.env.EnvFactory;
import org.apache.iotdb.it.framework.IoTDBTestRunner;
import org.apache.iotdb.itbase.category.ClusterIT;
import org.apache.iotdb.itbase.category.LocalStandaloneIT;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.junit.runner.RunWith;

import java.sql.*;
import java.util.HashMap;
import java.util.Map;

import static org.junit.Assert.*;

@RunWith(IoTDBTestRunner.class)
@Category({LocalStandaloneIT.class, ClusterIT.class})
public class IoTDBAlignedSeriesQueryWithDeletionIT {

    protected static boolean enableSeqSpaceCompaction;
    protected static boolean enableUnseqSpaceCompaction;
    protected static boolean enableCrossSpaceCompaction;
    protected static int maxTsBlockLineNumber;

    @BeforeClass
    public static void setUp() throws Exception {
        enableSeqSpaceCompaction = ConfigFactory.getConfig().isEnableSeqSpaceCompaction();
        enableUnseqSpaceCompaction = ConfigFactory.getConfig().isEnableUnseqSpaceCompaction();
        enableCrossSpaceCompaction = ConfigFactory.getConfig().isEnableCrossSpaceCompaction();
        maxTsBlockLineNumber = ConfigFactory.getConfig().getMaxTsBlockLineNumber();
        ConfigFactory.getConfig().setEnableSeqSpaceCompaction(false);
        ConfigFactory.getConfig().setEnableUnseqSpaceCompaction(false);
        ConfigFactory.getConfig().setEnableCrossSpaceCompaction(false);
        ConfigFactory.getConfig().setMaxTsBlockLineNumber(3);
        EnvFactory.getEnv().initBeforeClass();
        AlignedWriteUtil.insertData();

        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {
            statement.execute("delete from root.sg1.d1.* where time <= 2");
        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }

    @AfterClass
    public static void tearDown() throws Exception {
        EnvFactory.getEnv().cleanAfterClass();
        ConfigFactory.getConfig().setEnableSeqSpaceCompaction(enableSeqSpaceCompaction);
        ConfigFactory.getConfig().setEnableUnseqSpaceCompaction(enableUnseqSpaceCompaction);
        ConfigFactory.getConfig().setEnableCrossSpaceCompaction(enableCrossSpaceCompaction);
        ConfigFactory.getConfig().setMaxTsBlockLineNumber(maxTsBlockLineNumber);
    }

    @Test
    public void selectAllDeletedColumns() {
        // data at timestamp [1,2] has been deleted and should not be kept in result
        String[] retArray = {
                "3,30000.0,null,30000", "4,4.0,4,null",
        };

        String[] columnNames = {"root.sg1.d1.s1", "root.sg1.d1.s2", "root.sg1.d1.s3"};

        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement();
             ResultSet resultSet =
                     statement.executeQuery("select s1, s2, s3 from root.sg1.d1 where time <= 4")) {

            ResultSetMetaData resultSetMetaData = resultSet.getMetaData();
            Map<String, Integer> map = new HashMap<>();
            for (int i = 1; i <= resultSetMetaData.getColumnCount(); i++) {
                map.put(resultSetMetaData.getColumnName(i), i);
            }
            assertEquals(columnNames.length + 1, resultSetMetaData.getColumnCount());
            int cnt = 0;
            while (resultSet.next()) {
                StringBuilder builder = new StringBuilder();
                builder.append(resultSet.getString(1));
                for (String columnName : columnNames) {
                    int index = map.get(columnName);
                    builder.append(",").append(resultSet.getString(index));
                }
                assertEquals(retArray[cnt], builder.toString());
                cnt++;
            }
            assertEquals(retArray.length, cnt);
        } catch (SQLException e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }

    @Test
    public void selectAllDeletedAndNullColumns() {
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement();
             ResultSet resultSet =
                     statement.executeQuery("select s1, s4 from root.sg1.d1 where time <= 2")) {
            // data at timestamp [1,2] has been deleted and should not be kept in result
            // data of root.sg1.d1.s4 is not deleted at timestamp 2, but it is null
            assertFalse(resultSet.next());

        } catch (SQLException e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }
}
